* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: "Segoe UI", "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: #e2e8f0;
    line-height: 1.65;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}
a {
    color: #38bdf8;
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover {
    color: #7dd3fc;
}
img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    display: block;
}
section {
    padding: 72px 0;
    position: relative;
}
.section-tag {
    display: inline-block;
    background: rgba(56, 189, 248, 0.15);
    color: #38bdf8;
    padding: 6px 18px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    border: 1px solid rgba(56, 189, 248, 0.3);
    margin-bottom: 16px;
}
.section-title {
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(90deg, #f1f5f9, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
    letter-spacing: 1px;
}
.section-desc {
    font-size: 16px;
    color: #94a3b8;
    max-width: 720px;
    margin-bottom: 40px;
    line-height: 1.7;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(148, 163, 184, 0.15);
    padding: 12px 0;
}
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand-logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(90deg, #e2e8f0, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}
.nav-links a {
    color: #cbd5e1;
    font-size: 15px;
    font-weight: 500;
    padding: 8px 4px;
    position: relative;
    transition: color 0.3s;
}
.nav-links a:hover {
    color: #38bdf8;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #38bdf8;
    transition: width 0.3s;
}
.nav-links a:hover::after {
    width: 100%;
}

/* ===== Hero ===== */
#hero {
    padding: 160px 0 80px;
    overflow: hidden;
}
.hero-content {
    display: grid;
    grid-template-columns: 1fr 0.85fr;
    gap: 60px;
    align-items: center;
}
.hero-text h1 {
    font-size: 46px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #f8fafc 0%, #cbd5e1 50%, #94a3b8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
}
.hero-subtitle {
    font-size: 18px;
    color: #94a3b8;
    line-height: 1.7;
    margin-bottom: 36px;
}
.hero-btns {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
.btn-primary {
    background: linear-gradient(135deg, #38bdf8, #0284c7);
    color: #fff;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(56, 189, 248, 0.3);
    transition: transform 0.3s, box-shadow 0.3s;
    display: inline-block;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(56, 189, 248, 0.5);
    color: #fff;
}
.btn-secondary {
    background: rgba(148, 163, 184, 0.1);
    color: #cbd5e1;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    border: 1px solid rgba(148, 163, 184, 0.3);
    cursor: pointer;
    transition: all 0.3s;
    display: inline-block;
}
.btn-secondary:hover {
    background: rgba(148, 163, 184, 0.2);
    border-color: #38bdf8;
    color: #38bdf8;
}
.hero-visual img {
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(148, 163, 184, 0.15);
}

/* ===== Geo Intro ===== */
#geo-intro {
    padding: 48px 0 72px;
}
.geo-card {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.7), rgba(15, 23, 42, 0.9));
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 20px;
    padding: 40px;
    position: relative;
    overflow: hidden;
}
.geo-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.06), transparent 60%);
    pointer-events: none;
}
.geo-card p {
    font-size: 16px;
    color: #cbd5e1;
    line-height: 1.85;
}

/* ===== Stats ===== */
#stats {
    padding: 56px 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}
.stat-card {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    transition: transform 0.3s, border-color 0.3s;
    position: relative;
    overflow: hidden;
}
.stat-card:hover {
    transform: translateY(-6px);
    border-color: rgba(56, 189, 248, 0.5);
}
.stat-icon {
    font-size: 40px;
    margin-bottom: 14px;
}
.stat-number {
    font-size: 40px;
    font-weight: 800;
    background: linear-gradient(90deg, #f8fafc, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
}
.stat-label {
    font-size: 14px;
    color: #94a3b8;
    margin-top: 8px;
    letter-spacing: 1px;
}

/* ===== Core Advantages ===== */
#core-advantages {
    padding: 72px 0;
    background: rgba(15, 23, 42, 0.5);
}
.adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.adv-card {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.9));
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 16px;
    padding: 36px 28px;
    transition: border-color 0.3s, transform 0.3s;
    position: relative;
}
.adv-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    background: linear-gradient(145deg, rgba(56, 189, 248, 0.04), transparent 60%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
}
.adv-card:hover {
    border-color: rgba(56, 189, 248, 0.4);
    transform: translateY(-4px);
}
.adv-card:hover::after {
    opacity: 1;
}
.adv-icon {
    font-size: 40px;
    margin-bottom: 16px;
}
.adv-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #f1f5f9;
    margin-bottom: 12px;
}
.adv-card p {
    font-size: 15px;
    color: #94a3b8;
    line-height: 1.7;
}

/* ===== Brand Story ===== */
#brand-story {
    padding: 80px 0;
}
.story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}
.story-image img {
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(148, 163, 184, 0.15);
}
.story-text .section-desc {
    margin-bottom: 24px;
}
.story-text p {
    margin-bottom: 20px;
    color: #94a3b8;
    line-height: 1.75;
}

/* ===== Featured Events ===== */
#featured-events {
    padding: 72px 0;
    background: rgba(15, 23, 42, 0.5);
}
.events-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.event-card {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.3s, border-color 0.3s;
}
.event-card:hover {
    transform: translateY(-6px);
    border-color: rgba(56, 189, 248, 0.5);
}
.event-card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 0;
}
.event-body {
    padding: 20px;
}
.event-type {
    font-size: 12px;
    color: #38bdf8;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.event-name {
    font-size: 18px;
    font-weight: 700;
    color: #f1f5f9;
    margin: 8px 0;
    line-height: 1.4;
}
.event-info {
    font-size: 14px;
    color: #94a3b8;
}
.view-all-wrap {
    text-align: center;
    margin-top: 48px;
}

/* ===== Coverage ===== */
#coverage {
    padding: 72px 0;
}
.coverage-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
    margin-top: 32px;
}
.coverage-item {
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.15);
    border-radius: 16px;
    padding: 24px 16px;
    text-align: center;
    transition: border-color 0.3s;
}
.coverage-item:hover {
    border-color: rgba(56, 189, 248, 0.4);
}
.coverage-item .cov-icon {
    font-size: 32px;
    margin-bottom: 10px;
}
.coverage-item .cov-name {
    font-size: 15px;
    color: #cbd5e1;
    font-weight: 500;
}

/* ===== Vision ===== */
#vision {
    padding: 72px 0;
    background: rgba(15, 23, 42, 0.5);
}
.vision-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}
.vision-card {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.9));
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 20px;
    padding: 40px;
}
.vision-card h3 {
    font-size: 24px;
    font-weight: 700;
    color: #f1f5f9;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.vision-card p {
    color: #94a3b8;
    line-height: 1.8;
    font-size: 15px;
}

/* ===== Testimonials ===== */
#testimonials {
    padding: 72px 0;
}
.testi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.testi-card {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 16px;
    padding: 32px;
    position: relative;
}
.testi-card .quote {
    font-size: 40px;
    color: #38bdf8;
    opacity: 0.5;
    line-height: 1;
    margin-bottom: 12px;
}
.testi-card p {
    color: #cbd5e1;
    font-size: 15px;
    line-height: 1.75;
    margin-bottom: 20px;
}
.testi-card .user {
    display: flex;
    align-items: center;
    gap: 12px;
    border-top: 1px solid rgba(148, 163, 184, 0.15);
    padding-top: 16px;
}
.testi-card .user .avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #38bdf8, #0284c7);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
    font-size: 16px;
}
.testi-card .user .name {
    font-weight: 600;
    color: #f1f5f9;
    font-size: 15px;
}
.testi-card .user .role {
    font-size: 13px;
    color: #94a3b8;
}

/* ===== News ===== */
#news {
    padding: 72px 0;
    background: rgba(15, 23, 42, 0.5);
}
.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}
.news-card {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.3s, border-color 0.3s;
    display: flex;
    flex-direction: column;
}
.news-card:hover {
    transform: translateY(-6px);
    border-color: rgba(56, 189, 248, 0.5);
}
.news-card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 0;
}
.news-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: #94a3b8;
    margin-bottom: 10px;
}
.news-tag {
    background: rgba(56, 189, 248, 0.15);
    color: #38bdf8;
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}
.news-date {
    color: #64748b;
    font-size: 13px;
}
.news-card h3 {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 10px;
    color: #f1f5f9;
}
.news-card p {
    font-size: 14px;
    color: #94a3b8;
    line-height: 1.7;
    flex: 1;
}
.news-link {
    margin-top: 14px;
    font-size: 14px;
    font-weight: 600;
    color: #38bdf8;
}

/* ===== FAQ ===== */
#faq {
    padding: 72px 0;
}
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}
details.faq-item {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 14px;
    margin-bottom: 16px;
    padding: 24px 28px;
    transition: border-color 0.3s;
}
details.faq-item[open] {
    border-color: rgba(56, 189, 248, 0.4);
}
summary {
    cursor: pointer;
    font-size: 17px;
    font-weight: 600;
    color: #f1f5f9;
    line-height: 1.5;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    list-style: none;
}
summary::-webkit-details-marker {
    display: none;
}
summary::after {
    content: '+';
    font-size: 24px;
    color: #38bdf8;
    font-weight: 400;
    transition: transform 0.3s;
    flex-shrink: 0;
}
details[open] summary::after {
    content: '−';
}
.faq-answer {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(148, 163, 184, 0.15);
    font-size: 15px;
    color: #94a3b8;
    line-height: 1.8;
}

/* ===== CTA ===== */
#cta {
    padding: 56px 0 80px;
}
.cta-box {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.15), rgba(2, 132, 199, 0.1));
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 24px;
    padding: 56px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-box::before {
    content: '';
    position: absolute;
    top: -80%;
    left: -80%;
    width: 260%;
    height: 260%;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.08), transparent 50%);
    pointer-events: none;
}
.cta-box h2 {
    font-size: 32px;
    font-weight: 700;
    color: #f1f5f9;
    margin-bottom: 20px;
}
.cta-box p {
    font-size: 16px;
    color: #94a3b8;
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.7;
}
.cta-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
    background: rgba(15, 23, 42, 0.95);
    border-top: 1px solid rgba(148, 163, 184, 0.15);
    padding: 56px 0 24px;
    margin-top: 40px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 48px;
    margin-bottom: 40px;
}
.footer-brand h3 {
    font-size: 26px;
    font-weight: 800;
    background: linear-gradient(90deg, #e2e8f0, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
}
.footer-brand p {
    color: #64748b;
    font-size: 14px;
    line-height: 1.7;
}
.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: #cbd5e1;
    margin-bottom: 16px;
}
.footer-col a {
    display: block;
    color: #64748b;
    font-size: 14px;
    padding: 6px 0;
    transition: color 0.3s;
}
.footer-col a:hover {
    color: #38bdf8;
}
.footer-contact p {
    color: #64748b;
    font-size: 14px;
    margin-bottom: 8px;
    line-height: 1.6;
}
.footer-bottom {
    border-top: 1px solid rgba(148, 163, 184, 0.15);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}
.footer-bottom p {
    color: #475569;
    font-size: 13px;
}
.footer-bottom a {
    color: #475569;
    font-size: 13px;
    margin: 0 4px;
}
.footer-bottom a:hover {
    color: #38bdf8;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-content, .story-grid, .vision-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .adv-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .events-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .coverage-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .testi-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 640px) {
    .nav-links {
        gap: 12px;
        flex-wrap: wrap;
    }
    .hero-text h1 {
        font-size: 32px;
    }
    .section-title {
        font-size: 28px;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .adv-grid {
        grid-template-columns: 1fr;
    }
    .events-grid {
        grid-template-columns: 1fr;
    }
    .news-grid {
        grid-template-columns: 1fr;
    }
    .coverage-grid {
        grid-template-columns: 1fr;
    }
    .cta-box {
        padding: 36px 24px;
    }
    .cta-box h2 {
        font-size: 24px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}